Transformer Principle

Click Run Now, and choose the Transformer tab.

What happens when you turn the battery on and off?
What happens when you replace the battery with an AC source?
What happens when you move the coils closer and farther away?
What happens when you increase the number of coils in the output circuit?

Transformers and Efficiency

EE8: Power Grid
This exercise shows you how the power company needs to anticipate and react to changing demands for electrical energy.

1. File Upload - Maximum Points: 2
Grab the document called EE8_PowerGrid from my Teacher's folder. When you have finished Page 2, please TAKE A SCREENSHOT of your graph and upload it here!

2. Multiple Choice - Maximum Points: 5
During which hour of the day did they need the most power (on average)?

Midnight
5 A.M.
Noon
5 P.M.

3. Multiple Choice - Maximum Points: 1
How did power demands change over the course of the day?

The demands got smaller in the early hours of the day, peaked around dinnertime, and then declined.
The demands got smaller in the early hours of the day, peaked around "primetime", and then declined.
The demands got smaller in the early hours of the day, peaked around lunchtime, and then declined.

4. Multiple Choice - Maximum Points: 1
Which explanation would make the pattern look the way it did.

People use more energy when the sun is highest in the sky.
People use more energy until it starts to cool off in the evening.
People use more energy when they first arrive at work.

5. Essay - Maximum Points: 1
How much energy was used during that 24-hour period?

6. Essay - Maximum Points: 1
Tell me something else that you noticed about the pattern!